LDLN015xx
150 mA - ultra low noise - high PSRR linear voltage regulator IC
Preliminary data
Features
■ Ultra low noise: 6.3 µVRMS from 10 Hz to 100 kHz
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DFN6 (2 x 2 mm)
■Output voltage tolerance: ± 1% at 25 °C
■150 mA guaranteed output current
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■Logic-controlled electronic shutdown
■Compatible with ceramic capacitor (COUT = 0.47 µF)
■No bypass capacitor is required
■Internal current and thermal limit
■Package DFN6 (2 x 2 mm)
■Temperature range: - 40 °C to 125 °C
Description
The LDLN015xx is an ultra low noise linear regulator which provides 150 mA maximum current from an input voltage ranging from 2.1 V to 5.5 V with a typical dropout voltage of 86 mV.
With its 6.3 µVRMS noise value in a band from 10 Hz to 100 kHz, the LDLN015xx provides a very
clean output suitable for ultra sensitive loads. It is
stable with ceramic capacitors. High PSRR, low quiescent current and very low noise features make it suitable for low power battery powered applications. Power supply rejection is higher than 90 dB at low frequencies and starts to roll off at 10 kHz. The enable logic control function puts the LDLN015xx into shutdown mode allowing a total current consumption lower than 1 µA. The device also includes a short-circuit constant current limiting and thermal protection. Typical applications are noise sensitive loads like ADC, VCO in mobile phones, and personal digital assistants (PDAs).
Table 1. |
Device summary |
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Part numbers |
Order codes |
Output voltages |
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LDLN015XX10 |
LDLN015PU10R |
1.0 V |
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LDLN015XX12 |
LDLN015PU12R |
1.2 V |
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LDLN015XX15 |
LDLN015PU15R |
1.5 V |
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LDLN015XX18 |
LDLN015PU18R |
1.8 V |
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LDLN015XX28 |
LDLN015PU28R |
2.8 V |
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LDLN015XX33 |
LDLN015PU33R |
3.3 V |
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January 2012 |
Doc ID 022735 Rev 1 |
1/17 |
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to |
www.st.com |
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change without notice. |
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Contents |
LDLN015xx |
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Contents
1 |
Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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2 |
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. 4 |
3 |
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
5 |
4 |
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
6 |
5 |
Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
8 |
6 |
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
12 |
7 |
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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2/17 |
Doc ID 022735 Rev 1 |
LDLN015xx |
Application diagram |
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VIN
VBG |
RC filter |
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Bandgap |
VREF |
PDMOS |
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reference |
OPAMP |
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OPAMP |
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VFB |
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VOUT
Doc ID 022735 Rev 1 |
3/17 |
Pin configuration |
LDLN015xx |
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IN |
1 |
6 |
OUT |
NC |
2 |
5 |
NC |
EN |
3 |
4 |
GND |
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CS26700 |
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Table 2. |
Pin description |
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Pin n° |
Symbol |
Name and function |
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1 |
IN |
Input voltage |
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2 |
NC |
Not connected |
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Enable input. |
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3 |
EN |
Set VEN > 0.9 to turn on the device |
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Set VEN < 0.4 to turn off the device |
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4 |
GND |
Ground |
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5 |
NC |
Not connected |
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6 |
OUT |
Output voltage |
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Note: |
Exposed pad is electrically connected to GND. |
4/17 |
Doc ID 022735 Rev 1 |
LDLN015xx |
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Maximum ratings |
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3 |
Maximum ratings |
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Table 3. |
Absolute maximum ratings |
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Symbol |
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Parameter |
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Value |
Unit |
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VIN |
DC input voltage |
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-0.3 to 7 |
V |
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VOUT |
DC output voltage |
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from -0.3 to 4.6 |
V |
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VEN |
Enable input voltage |
from -0.3 to VIN + 0.3 |
V |
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IOUT |
Output current |
Internally limited |
mA |
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PD |
Power dissipation |
Internally limited |
mW |
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TSTG |
Storage temperature range |
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-65 to 150 |
°C |
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TOP |
Operating junction temperature range |
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-40 to 125 |
°C |
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ESD |
Human body model |
± 3 |
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kV |
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Machine model |
± 300 |
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V |
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Note: |
Absolute maximum ratings are those values beyond which damage to the device may occur. |
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Functional operation under these conditions is not implied. |
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Table 4. |
Thermal data |
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Symbol |
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Parameter |
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Value |
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Unit |
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RthJA |
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Thermal resistance junction-ambient |
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105 |
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°C/W |
RthJC |
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Thermal resistance junction-case |
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20 |
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°C/W |
Doc ID 022735 Rev 1 |
5/17 |
Electrical characteristics |
LDLN015xx |
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TJ = 25 °C, VIN = VOUT(NOM) + 1 V, CIN = COUT = 0.47 µF, IOUT = 1 mA, VEN = VIN, unless otherwise specified.
Table 5. |
Electrical characteristics (1) (2) |
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Symbol |
Parameter |
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Test conditions |
Min. |
Typ. |
Max. |
Unit |
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VIN |
Operating input voltage |
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2.1 |
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5.5 |
V |
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IOUT =1mA |
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-1 |
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1 |
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VOUT |
VOUT accuracy |
-40°C<TJ<125°C, IOUT=from 1mA to |
-2 |
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2 |
% |
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150mA, VIN=VOUT(NOM) + 1V to 5.5 |
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VOUT |
Static line regulation |
VOUT +1V ≤VIN ≤5.5V, IOUT = 1mA |
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0.005 |
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%/V |
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VOUT |
Static load regulation |
IOUT = 1mA to 150mA |
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0.001 |
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%/mA |
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VDROP |
Dropout voltage (3) |
IOUT = 150mA, VOUT > 1.9V |
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86 |
180 |
mV |
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-40°C<TJ<125°C |
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10Hz to 100kHz, IOUT = 0mA, |
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6.3 |
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eN |
Output noise voltage |
VOUT =1.0V |
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µVRMS |
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10Hz to 100kHz, IOUT = 150mA, |
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9.9 |
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VOUT =1.0V |
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VIN = VOUTNOM+1V+/-VRIPPLE |
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92 |
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VRIPPLE = 0.5V Freq.=1kHz |
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IOUT = 10mA |
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SVR |
Supply voltage |
VIN = VOUTNOM+1V+/-VRIPPLE |
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89 |
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dB |
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rejection VOUT =1.0V |
VRIPPLE = 0.5V Freq.=10kHz |
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IOUT = 10mA |
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VIN = VOUTNOM+1V+/-VRIPPLE |
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50 |
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VRIPPLE = 0.5V Freq.=100kHz |
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IOUT = 1mA |
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IOUT=0mA |
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17 |
60 |
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IOUT=0mA, -40°C<TJ<125°C |
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54 |
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IQ |
Quiescent current |
IOUT=150mA |
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120 |
µA |
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I |
=150mA, -40°C<T |
J |
<125°C |
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OUT |
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VIN input current in OFF mode |
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0.002 |
2 |
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VEN=GND |
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ISC |
Short-circuit current |
RL=0; VIN=2.0V |
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300 |
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mA |
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VEN |
Enable input logic low |
VIN = 2.1V to 5.5V, -40°C<TJ <125°C |
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0.4 |
V |
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Enable input logic high |
VIN = 2.1V to 5.5V, -40°C<TJ <125°C |
0.9 |
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IEN |
Enable pin input |
VEN=5.5V |
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0.1 |
100 |
nA |
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current |
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T |
Turn-on time (4) |
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110 |
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µs |
ON |
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6/17 |
Doc ID 022735 Rev 1 |